Don't believe the non-programming hype

Background This will be a shorter, less-polished post than usual.  It's really just a way to start to bring a bit of structure to my thoughts.  Feel free to add some comments or weigh in on the linked Twitter thread. I came away from a recent...

The tragedy of Vyatta Core's demise

Vyatta Core (VC) is one of my top fanboy loves.  It provides a firewall/router based on Debian Linux but with an elegant configuration system modeled on Junos.  Vyatta previously offered VC as a community edition of their commercial router (with...

Three days with Junos

Background This post is the story of my first practical look at Junos on Juniper EX-series switches. One day last December, Skeeve Stevens from eintellego opened a can of worms by offering a deal on Juniper equipment to all network engineers on...

What's in my podcast roll

I've always been interested in learning and developing my skills, and over the past couple of years i've been increasingly targeting my professional development.  On a long commute, a great way to explore different areas of interest is listening...

Initial thoughts on the HP A5500-EI switch

Background I first came across HP's A5500 switches when i started looking at configuring VRRP and distributed trunking to provide routing redundancy for the core of a client's campus network using two ProCurve 5400 switches. I found that i could...

NAT is evil, but not bad

2011-09-20: Edited to add section about IPv6 options; minor cleanup; references added. This is kind of a follow-on from my post about the subnet addressing design differences between IPv4 and IPv6. Recently, Tom Hollingsworth started a little...

A strange rrdtool error; Linux conntrack documentation

Last week i made some fairly significant changes on a client's production firewall/routing cluster during our maintenance window.  The next morning there were reports of file server drives not connecting correctly and inaccessible web sites. ...

Pondering subnet allocations

Edit, 2011-05-03: To all those poor souls who have been directed here by Google in their search for best practices on IPv4 and/or IPv6 subnet allocations (or worse, the HP A5500's NAT capabilities), please accept my sincere apologies.  This page...

When (Windows) software updates go awry

One of my clients had some very interesting Internet traffic statistics last week.  We came in Thursday morning and found that overnight we had downloaded over 700 GB of data from our ISP (UQ SchoolsNet). When we looked through our proxy server...